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Voltage Balancing Control of Improved ZVS FBTL Converter for WECS

Janani.K, Anbarasu.L

This project proposes a newly developed three level dc-dc converter which is designed with zero voltage switching technique for the purpose of reducing conduction loss and frequent switching of the switches used in the converter. A passive filter is used to reduce the primary voltage stress of medium frequency transformer and to improve the performance of the converter. A modulation strategy, including two operation modes, is proposed for the IFBTL dc/dc converter. Furthermore a voltage balancing control strategy is also proposed for the improved ZVS full bridge three level DC-DC converter. With the passive filter and the modulation strategy, the voltage stress of the transformer in the Improved ZVS FBTL DC/DC converter can be effectively reduced, which is very significant in the medium-voltage and high-power application. It is performed by designing a full bridge three level converter with ZVS technique and a passive filter and the converter is simulated using MATLAB SIMULINK.